Time for a King Ralph II
Enough time has passed to do a real time sequel, making Ralph the II mature enough to take the throne.
Goodman, Coduri, (good actors are dropping like flies lately) are still alive, even O'toole is still kicking and able to cameo a death scene.
Down side is, they'd probably get Seth Rogen to play Ralph II. (not a fan of Knocked Up or Superbad) And for the Doctor Who fans, Billie Piper as the love interest (or even dis-interest, Finland princess)